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got a code P0402 from the computer this morning for the CEL. egr excesive flow at idle
we know we need to clean the throttle body and egr passages behind the throttle body. should this take care of the problem?
it is the 99 SE Sport that we just got. Has 52k and was driven fairly easy. I had gotton on it a few times last night and then the light tripped when I was sitting in a line a traffic. I think some junk got stuck some place because the CEL turned off this morning.
- 95 Mystique LS - Zetec/5spd
- 99 Contour SeVT Sport - Duratec/5spd
Official NE-CEG Contour/Mustang Family
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I get this code all the time too, I just pull over and reset the code with my computer. I have already replaced the EGR valve, so I think its a vacuum problem in my case. Let me know what you find on his car. BTW, if the EGR is clogged or dirty, you can really only replace it, from what I remember, you cant clean these EGR's.
"Moore has also accused the American people of being the stupidest, most naive people on the face of the Earth. And after last weekend, he's got the box office numbers to prove it!"
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Brapple: clean the EGR passages first since it only costs a couple bucks for the stuff to do it and it's so easy to do. If that doesn't work I would replace the DPFE sensor, that is typically the problem.
99blacksesport: Your problem is most likely the DPFE sensor. They are relatively cheap and very simple to put on.
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I cleaned the TB and passages and cleared my P0402. I recently got back from a 6000 mile (honest) trip to the midwest and it showed again, then went away! Let me know if you fix the problem.
1999 Toreador Red SVT, DOB 4/22/99, 2005 Of 2760.
"Many posted questions are answered by farm boys"
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Originally posted by SweetSVT99:
Brapple: clean the EGR passages first since it only costs a couple bucks for the stuff to do it and it's so easy to do. If that doesn't work I would replace the DPFE sensor, that is typically the problem.
my father is on his way to the dealer tomorrow to get brake pads for the new car ans some other small things. A set a throttle body gaskets are on the list to so both the 99's will have this done.
will let you know if anything comes of it
- 95 Mystique LS - Zetec/5spd
- 99 Contour SeVT Sport - Duratec/5spd
Official NE-CEG Contour/Mustang Family
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What is a DPFE sensor, wheres it located, what does it do, etc..? Thanks for the help! -Nick
"Moore has also accused the American people of being the stupidest, most naive people on the face of the Earth. And after last weekend, he's got the box office numbers to prove it!"
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Originally posted by 99blacksesport:
What is a DPFE sensor, wheres it located, what does it do, etc..?
Check here:
http://www.contour.org/ubbthreads/showflat.php?Cat=&Board=trouble&Number=311440
96 Contour SE
Duratec V6 24-valve 2.5L ATX
108,000 mi.
Replaced: crankshaft w/ DMD, EGR valve (clogged), EVR, DPFE, PCV valve, evap emissions hose & tube (cracked), window regulator (broken), LH & RH PCV tubes, UIM gasket (leak), ignition coil
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If you do find it is the DPFE try getting one at discount (one of the sources that are mentioned on this site. I got one at cost $34.39 instead standard retail $75. From the same dealer only got a cousin with transmission shop, has an account. Get the new updated version Plastic F77Z-9J460-AB, it supposed to last long. This DPFE is a fun one the catch, even with shop CD and OBD II tool.
Paul
since you've got P0402 EGR flow at idle check the EGR solenoid, not only does it turn the vaccum on to operate the EGR the tiny filter inside allows the vaccum that EGR was operated with to vent. Even possible small piece of carbon holding the egr open slightly, however don't recall anyone actually saying that they found that.
It mine about six months of intermitents before the DPFE finally totally died. I even had 0401 & 0402 set at the same time once. insuffiecent & excessive
Last edited by F111D F; 07/01/03 01:11 AM.
Paul
98 Mystique LS 2ea (07/97)(08/98)
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How would I check the DPFE is causing my P0402? My TB is clean, theres a fairly new EGR on her too. Thanks alot! -Nick
"Moore has also accused the American people of being the stupidest, most naive people on the face of the Earth. And after last weekend, he's got the box office numbers to prove it!"
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Beside the obvious visual check of the two hoses that connect the two ports on the EGR pipe, a scan tool (in my case an old laptop with OBD-2.com software) the Ford manual has a test you do that actually lets you read or look for a certain voltages. Actully the PCM is doing it, the Scan tool is only part of the equation it sets up the PCM to do the test and gives a read out. Something like that right Mr. Pappas? George helped me chase mine down last year, nope, hmmmmmm just this spring I finally got it to totally fail. This is one time I'm glad I invested in Alex Pepers OBD II device and software. It's almost a necessity with vehicles now. You can waste allot of money and time, still takes me allot of time and money but then I'm trying to train myself. I fiqure in 10 more years I might get it mastered, but then the Mystique will be 15 years old. Then I'll have to start all over. But then that's what a car buff does.  Paul
Paul
98 Mystique LS 2ea (07/97)(08/98)
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